NGC/IC Project Restoration Effort
(This is a very very beta version)
NGC733
Basic Information
Location and Magnitude
Right Ascension: 1:56:33.8
Declination: +33:3:21
Constellation: TRI
Visual Magnitude: 15.3
Historic Information
Discoverer: Stoney B.
Year of discovery: 1850
Discovery aperture: 72.0
Observational
Summary description: vF, 2' p h 169
Sub-type: *
Corwin's Notes
=====
NGC 733 is almost certainly a star. Lord Rosse's observer, Bindon Stoney,
found a group of five nebulae in the area of NGC 736 (the brightest) on 11
October 1850. His sketch is reasonably accurate, though it is distorted in
that it exaggerates the north-south separations between the objects. His
micrometric offsets from N736 also point quite accurately to the surrounding
objects, including the star which I've taken as N733. The sketch confirms the
relative distances in the table between N733, N736, and N740 (the distance
between N733 and N736 is about half that between N736 and N740).
However, at the same position angle as the star, and just 100 arcsec further
from the star which I take as N733, is a faint galaxy. Not otherwise
catalogued, is this possibly the object which Stoney meant to measure and
sketch? Since the evidence from the sketch and the measurements point
directly at the star, though, I'm currently retaining it, and not the galaxy,
as N733. But I've nevertheless listed the galaxy, too, with the requisite
question marks.